(January 22, 2016, 10:45 AM EST) -- WASHINGTON, D.C. — A defendant failed to establish error in a firearms examiner’s testimony that markings on bullets recovered from a deceased man’s car were “unique” to a gun recovered from the defendant’s apartment, the District of Columbia Court of Appeals held Jan. 21 (Marlon Williams v. United States, No. CF1-18032-10, D.C. App.; 2016 D.C. App. LEXIS 6)....